Kuraray Co., Ltd.

Kuraray Kuraflex Co., Ltd.

Sumito Kiyooka

Toru Ochiai

Satoshi Koizumi

Tomoaki Kimura

Yasurou Araida

Nobuo Araya

Yasuro Araida

Kohei Hayashi

Ikuhisa Shiraishi

Masaru Koike

Tooru Ochiai

Atsumi Adachi

Kazutoshi Hirata

Hideki Kanezako

Masahiko Takamatsu

Noboru Miyake

Shinichi Shigeki

Kazuhiro Muraki

Naoaki Moritani

Kazuhisa Nakayama

Yasuhiko Sakamoto

Provided are a stretchable non-woven fabric including crimped fibers, satisfying the following formula: (&#x3c3;&#x2212;&#x3c3;)/(&#x3c3;&#x2212;&#x3c3;)&#x2265;2.5, when a stress &#x3c3; (N/50 mm) at a strain &#x3b5; of 20%, 30%, 55% and 65% in a stress-strain curve by a tensile test for at least one direction in a plane direction, is referred to as &#x3c3;, &#x3c3;, &#x3c3;and &#x3c3;, respectively, and a bandage including the non-woven fabric. The non-woven fabric and the bandage lead small deterioration in stretching performance when used repeatedly, and can be excellent in repetition durability.

Stretchable non-woven fabric having excellent repetition durability

A fiber assembly including fibrils including a fibril which is a part of a fiber extending in a direction of thickness of the fiber assembly and including a network structure formed with a binding portion resulting at least any from binding between fibrils and binding between a fibril and a fiber in at least any end portion in the direction of thickness of the fiber assembly and a liquid absorbent sheet-like article including the same as well as a fiber assembly which is excellent in diffusion of a liquid particularly at a surface and absorption thereof in the inside and includes fibrils and a liquid absorbent sheet-like article including the same as well as a method of manufacturing the fiber assembly can be provided.

Fiber assembly and liquid absorbent sheet-like article including the same and method of manufacturing fiber assembly

A liquid-retaining sheet contains a liquid-retaining layer that is able to absorb a liquid component, and the liquid-retaining layer is formed from a nonwoven structural member containing a transparent fiber. In the liquid-retaining sheet, the transparency shown below is adjusted to not more than 0.27.Transparency=Whiteness (%) of a sheet impregnated with 700% by mass of water relative to the sheet mass/Basis weight (g/m) The transparent fiber may contain a cellulose-series fiber substantially free from a carboxyl group (in particular, a regenerated cellulose fiber such as a solvent-spinning cellulose-series fiber). The proportion of the solvent-spinning cellulose-series fiber may be not less than 30% by mass in the transparent fiber. The liquid-retaining sheet may be a skin care sheet (in particular, a facial mask) that is impregnated with a liquid component containing a cosmetic preparation. The liquid-retaining sheet has an improved transparency in a wet state in spite of a nonwoven structural member contained in the sheet and shows a suitable strength in a wet state.

Liquid-retaining sheet and facial mask

To prepare a shaped product comprising a thermal adhesive fiber under moisture and having a fiber aggregate nonwoven structure. In the shaped product, the thermal adhesive fibers under moisture are melted to bond to fibers constituting the fiber aggregate nonwoven structure and the bonded fiber ratio is not more than 85%. The shaped product has an apparent density of 0.05 to 0.7 g/cm, a maximum bending stress of not less than 0.05 MPa in at least one direction, and a bending stress of not less than &#x2155; of the maximum bending stress at 1.5 times as large as the bending deflection at the maximum bending stress. The moistenable-thermal adhesive fiber may be a sheath-core form conjugated fiber comprising a sheath part comprising an ethylene-vinyl alcohol-series copolymer and a core part comprising a polyester-series resin. Such a shaped product can be used for a building board or the like since the shaped product has a high bending stress although the product is light and has a low density.

Molded object having nonwoven fibrous structure

In a nonwoven fiber assembly which comprises a fiber comprising a thermal adhesive fiber under moisture and in which the fiber are entangled with each other, the fibers are bonded at contacting points of the fibers by melting the thermal adhesive fiber under moisture to distribute the bonded points approximately uniformly, thereby obtaining a buffer substrate. The buffer substrate may further comprises a conjugated fiber comprising a plurality of resins which are different in thermal shrinkage and form a phase separation structure, and the conjugated fibers may have an approximately uniform crimps having an average curvature radius of 20 to 200 &#x3bc;m and are entangled with the fibers constituting the nonwoven fiber assembly. The buffer substrate can be obtained by a method comprising the steps of: forming a web from the fiber comprising the thermal adhesive fiber under moisture; and subjecting the obtained fiber web to a heat and moisture treatment with a high-temperature water vapor to melt the thermal adhesive fiber under moisture for bonding the fibers. The buffer substrate has a high air-permeability, an excellent cushion property and softness.

Buffer substrate and use thereof

A laminated sheet is produced by forming an adhesion layer permeable to a liquid component and contactable with a skin on at least one side of a liquid-retention layer comprising a nonwoven structural member and having an ability to absorb the liquid component. The adhesion layer comprises a nonwoven structural member comprising a fiber having a number-average fiber diameter of not more than 10 &#x3bc;m, and the thickness ratio of the adhesion layer relative to the liquid-retention layer is 1/4 to 1/100 as a ratio of the adhesion layer/the liquid-retention layer. The fiber of the nonwoven structural member of the adhesion layer may have a standard deviation of fiber diameter of not more than 5. The nonwoven structural member of the liquid-retention layer may comprise a fiber having a fiber diameter larger than that of the fiber of the adhesion layer. The laminated sheet has a liquid retentivity and a liquid releasability in a well-balanced manner, and has an excellent adhesion and an excellent fit to the skin in the state where the sheet is impregnated with a liquid component.

Laminated sheet and process for producing the same

A sound insulation floor structure comprises a floor backing member, a floor finishing layer, and an intermediate layer between the floor backing member and the floor finishing layer, the intermediate layer comprising a buffer member comprising a nonwoven structure. The nonwoven structure comprises a thermal adhesive fiber under moisture which is melt-bonded to a fiber of the nonwoven structure to fix the fibers. For example, the sound insulation floor structure may comprise, in sequence, a floor backing member, a buffer layer, an air layer, a hard layer, and a floor finishing layer. In the floor structure, a support memberis disposed between the buffer layerand the hard layer. The support member may occupy 10 to 70% of a floor area. The sound insulation floor structure prevents subsidence of a floor member due to walking, achieves comfortableness to walk, and has improved floor impact sound insulation.

Sound insulation floor structure and sound insulation floor component as well as method for reducing floor impact sound

To produce a nonwoven fabric comprising a conjugated fiber comprising a plurality of resins which are different in thermal shrinkage and form a phase separation structure. In the nonwoven fabric, the conjugated fibers are arranged in a direction approximately parallel to a surface direction of the nonwoven fabric and crimped. In addition, the conjugated fibers have an average curvature radius of fiber crimp of 20 to 200 &#x3bc;m and the crimps are distributed approximately uniformly in a thickness direction of the nonwoven fabric. The nonwoven fabric is substantially free from an adhesive agent. In the nonwoven fabric, each fiber is substantially not melt-bonded to another. The conjugated fiber may comprise a polyalkylene arylate-series resin and a modified polyalkylene arylate-series resin and have a side-by-side or eccentric sheath-core form. Since the bimetal form conjugated fibers having specific crimps are appropriately entangled with each other, the nonwoven fabric has a high stretchability and is easily torn by hand, without using scissors. The nonwoven fabric is suitable for a tape such as a bandage or a supporter.

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Okayama, Japan

Sumito Kiyooka